where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -

WesDyne International (AMDATA Products)
WesDyne is an engineering and technical services firm dedicated to providing standard and custom nondestructive examinations (NDE) products and systems
925 views
Technical Discussions
Dmitry Ostrovsky
Dmitry Ostrovsky
05:29 May-28-2001
3 layer PE - PU foam - PE pipe concentricity measurement

Please help! I am interested in on- line concentricity measurement of the pipe, which consists of 3 layers: PE internal pipe, Polyurethane foam, and PE outside pipe.

Can you advice companies I should contact?

Regards,

Dmitry Ostrovsky


    
 
 Reply 
 
Rolf Diederichs
Director,
NDT.net, Germany, Joined Nov 1998, 608

Rolf Diederichs

Director,
NDT.net,
Germany,
Joined Nov 1998
608
09:45 May-28-2001
Re: 3 layer PE - PU foam - PE pipe concentricity measurement
: Please help! I am interested in on- line concentricity measurement of the pipe, which consists of 3 layers: PE internal pipe, Polyurethane foam, and PE outside pipe.
.
: Can you advice companies I should contact?
.
: Regards,
.
: Dmitry Ostrovsky

Refer to "Coextrusion Layer Thickness Measurement"
http://www.ndt.net/article/rohrext/us_coex/us_coe_e.htm

For multilayer foamed PVC pipes the first layer can be measured. The second Layer also, but not
for all thickness and density conditions. Usually be the last (inner) thin PVC layer cannot be measured.

I personally have done tests at Wavin in Germany to solve this problem.
The main problem is that the inner layer interferes with the backwall echo.
I see a little chance to measure the pipe, however the liability is questionable.
You may get better results near the die since the temperature is higher
and sound velocity is low. That means the separation of the inner layer echoes is better.
But all this is not easy and needs a lot of trials.

Rolf Diederichs



    
 
 Reply 
 
Dr. Patel
R & D, Consultant to Universities/Industries
Fallon Ultrasonics/McMaster University, Canada, Joined May 2001, 20

Dr. Patel

R & D, Consultant to Universities/Industries
Fallon Ultrasonics/McMaster University,
Canada,
Joined May 2001
20
06:20 May-29-2001
Re: 3 layer PE - PU foam - PE pipe concentricity measurement
: Please help! I am interested in on- line concentricity measurement of the pipe, which consists of 3 layers: PE internal pipe, Polyurethane foam, and PE outside pipe.
.
: Can you advice companies I should contact?
.
: Regards,
.
: Dmitry Ostrovsky

We need details on tube and if you have small sample than you can send us. We are supplying number of systems for tube testing for OD ID and ovality and concentricity with very high accuracy. If you are interested than contact us at
Fallon Ultrasonics Inc.
3 Benemar Court, Hamilton, Ontario L8W 2R1
Canada.
.
Regards
Dr. Patel


    
 
 Reply 
 
Dmitry Ostrovsky
Dmitry Ostrovsky
02:13 May-30-2001
Re: 3 layer PE - PU foam - PE pipe concentricity measurement
I appreciate your comments and suggestions! As far as details on the application, max OD of the inner PE pipe is 110 mm; max OD of the outside PE layer is 162 mm with the wall thickness of the outside layer about 3.5 mm. We are just interested to track how well centered is the inside pipe in polyurethane.

Regards,

Dmitry Ostrovsky


: Please help! I am interested in on- line concentricity measurement of the pipe, which consists of 3 layers: PE internal pipe, Polyurethane foam, and PE outside pipe.
.
: Can you advice companies I should contact?
.
: Regards,
.
: Dmitry Ostrovsky
.



    
 
 Reply 
 

Product Spotlight

Varex Imaging Large Field of View (FOV) Digital Detector Arrays (DDAs)

A larger FOV DDA can reduce the space and volume of the X-ray inspection system on the factory floor
...
, enable faster scanning times, better throughput and better resolution images at a lower dose. Customers can also save time and money. With these benefits in mind, Varex Imaging has designed a family of large FOV detectors (4343HE, XRD 1611, 4343DX-I, 4343CT) for our industrial imaging customers.
>

Compact NDT inspection-heads for measurements with active thermography

The compact inspection head is suitable for thermographic ndt tasks. The uncooled infrared camera
...
is specially developed for NDI-tasks and offers a thermal sensitivity until now known only from thermal imagers with cooled detector. All required components and functions are integrated into the inspection-head. You will only need an ethernet cable to connect the sensor with the evaluation system.
>

GEKKO - Portable Phased Array Testing with TFM in Real-Time

The portable phased array testing system GEKKO provides 64 parallel test channels. On creating testi
...
ng parameters the operator is assisted by the CIVA software. Due to its modular set-up the GEKKO instrument is suitable for operators of all skill levels.
>

Conformable wedge transducer

The conformability is obtained with a flexible membrane filled with water between the transducer and
...
the inspected component. The coupling between the membrane and the component requires a small quantity of water or couplant. The conformable wedge combines the acoustic performance of immersion technique with good coupling and low attenuation.
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window